import axios, { AxiosInstance, AxiosError, AxiosRequestConfig, InternalAxiosRequestConfig, AxiosResponse } from 'axios';
import { showFullScreenLoading, tryHideFullScreenLoading } from '@/components/Loading/fullScreen';
import { LOGIN_URL } from '@/config';
import { ElMessage } from 'element-plus';
import { ResultData } from '@/api/interface';
import { ResultEnum } from '@/enums/httpEnum';
import { checkStatus } from './helper/checkStatus';
import { useUserStore } from '@/stores/modules/user';
import { sysCode } from '@/api/config/systemCode';
import router from '@/routers';

export interface CustomAxiosRequestConfig extends InternalAxiosRequestConfig {
  loading?: boolean;
  token?: boolean;
}

const config = {
  // 默认地址请求地址，可在 .env.** 文件中修改
  baseURL: import.meta.env.VITE_API_URL as string,
  // 设置超时时间
  timeout: ResultEnum.TIMEOUT as number,
  // 跨域时候允许携带凭证
  withCredentials: true
};

class RequestHttp {
  service: AxiosInstance;
  public constructor(config: AxiosRequestConfig) {
    // instantiation
    this.service = axios.create(config);

    /**
     * @description 请求拦截器
     * 客户端发送请求 -> [请求拦截器] -> 服务器
     * token校验(JWT) : 接受服务器返回的 token,存储到 vuex/pinia/本地储存当中
     */
    this.service.interceptors.request.use(
      (config: CustomAxiosRequestConfig) => {
        const userStore = useUserStore();
        // 如果需要全局加载 添加 loading 字段
        !config.loading ?? (config.loading = true);
        config.loading && showFullScreenLoading();

        // config?.token  = true 接口不验证 token 避免接口携带token前往不需要验证页面,被拦截验证token过期问题
        if (config.headers && typeof config.headers.set === 'function' && config?.token !== false) {
          config.headers.set('token', userStore.token);
          config.headers.set('userName', userStore.username);
        }

        this.setBasicParams(config);
        return config;
      },
      (error: AxiosError) => {
        return Promise.reject(error);
      }
    );

    /**
     * @description 响应拦截器
     *  服务器换返回信息 -> [拦截统一处理] -> 客户端JS获取到信息
     */
    this.service.interceptors.response.use(
      (response: AxiosResponse) => {
        const { code, message, data } = response.data || {};
        if (response.request.responseType && response.request.responseType === 'blob') {
          return response.data;
        }

        const userStore = useUserStore();
        const globalStore = useGlobalStore();
        globalStore.formLoading = false;
        tryHideFullScreenLoading();
        // 登陆失效
        if (code == ResultEnum.OVERDUE) {
          userStore.setToken('');
          router.replace(LOGIN_URL);
          ElMessage.error(message);
          return Promise.reject(data);
        }
        // 全局错误信息拦截（防止下载文件的时候返回数据流，没有 code 直接报错）
        if (code && code !== ResultEnum.SUCCESS) {
          ElMessage.error(message);
          return Promise.reject(data);
        }

        // 成功请求（在页面上除非特殊情况，否则不用处理失败逻辑）
        return data;
      },
      async (error: AxiosError) => {
        const { response } = error;

        tryHideFullScreenLoading();
        // 请求超时 && 网络错误单独判断，没有 response
        if (error.message.indexOf('timeout') !== -1) ElMessage.error('请求超时！请您稍后重试');
        if (error.message.indexOf('Network Error') !== -1) ElMessage.error('网络错误！请您稍后重试');
        // 根据服务器响应的错误状态码，做不同的处理
        if (response) checkStatus(response.status);
        // 服务器结果都没有返回(可能服务器错误可能客户端断网)，断网处理:可以跳转到断网页面
        if (!window.navigator.onLine) router.replace('/500');
        return Promise.reject(error);
      }
    );
  }

  setBasicParams(config: AxiosRequestConfig) {
    const { method } = config;
    const { systemCode } = config.data || {};
    const userStore = useUserStore();
    const { username } = userStore.userInfo;

    if (method === 'post') {
      config.data = {
        systemCode: systemCode || sysCode,
        ...config.data,
        douser: username
      };
    } else if (method === 'get') {
      config.params = {
        systemCode: systemCode || sysCode,
        ...config.params,
        douser: username
      };
    }
  }

  /**
   * @description 常用请求方法封装
   */
  get<T = any>(url: string, params?: object, _object = {}): Promise<T> {
    return this.service.get(url, { params, ..._object });
  }
  post<T = any>(url: string, params?: object | string, _object = {}): Promise<T> {
    return this.service.post(url, params, _object);
  }
  put<T = any>(url: string, params?: object, _object = {}): Promise<ResultData<T>> {
    return this.service.put(url, params, _object);
  }
  delete<T = any>(url: string, params?: any, _object = {}): Promise<ResultData<T>> {
    return this.service.delete(url, { params, ..._object });
  }
  download(url: string, params?: object, _object = {}): Promise<BlobPart> {
    return this.service.post(url, params, { ..._object, responseType: 'blob' });
  }
  getDownload(url: string, params?: object, _object = {}): Promise<BlobPart> {
    return this.service.get(url, { params, ..._object, responseType: 'blob' });
  }
}

export default new RequestHttp(config);
